Theoretical insight of physical adsorption for a single-component adsorbent + adsorbate system: I. thermodynamic property surfaces

Anutosh Chakraborty, Bidyut Baran Saha, Kim Choon Ng, Shigeru Koyama, Kandadai Srinivasan

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

Thermodynamic property surfaces for a single-component adsorbent + adsorbate system are derived and developed from the viewpoint of classical thermodynamics, thermodynamic requirements of chemical equilibrium, Gibbs law, and Maxwell relations. They enable us to compute the entropy and enthalpy of the adsorbed phase, the isosteric heat of adsorption, specific heat capacity, and the adsorbed phase volume thoroughly. These equations are very simple and easy to handle for calculating the energetic performances of any adsorption system. We have shown here that the derived thermodynamic formulations fill up the information gap with respect to the state of adsorbed phase to dispel the confusion as to what is the actual state of the adsorbed phase. We have also discussed and established the temperature-entropy diagrams of (i) CaCl 2-in-silica gel + water system for cooling applications, and (ii) activated carbon (Maxsorb III) + methane system for gas storage.

Original languageEnglish
Pages (from-to)2204-2211
Number of pages8
JournalLangmuir
Volume25
Issue number4
DOIs
Publication statusPublished - Feb 17 2009

Fingerprint

Adsorbates
adsorbents
Adsorbents
Thermodynamic properties
thermodynamic properties
Thermodynamics
Adsorption
thermodynamics
Specific heat
adsorption
Entropy
specific heat
entropy
confusion
Silica Gel
Methane
Silica gel
silica gel
activated carbon
Activated carbon

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Theoretical insight of physical adsorption for a single-component adsorbent + adsorbate system : I. thermodynamic property surfaces. / Chakraborty, Anutosh; Saha, Bidyut Baran; Ng, Kim Choon; Koyama, Shigeru; Srinivasan, Kandadai.

In: Langmuir, Vol. 25, No. 4, 17.02.2009, p. 2204-2211.

Research output: Contribution to journalArticle

Chakraborty, Anutosh ; Saha, Bidyut Baran ; Ng, Kim Choon ; Koyama, Shigeru ; Srinivasan, Kandadai. / Theoretical insight of physical adsorption for a single-component adsorbent + adsorbate system : I. thermodynamic property surfaces. In: Langmuir. 2009 ; Vol. 25, No. 4. pp. 2204-2211.
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